body {
    background-color: rgb(239, 239, 239);
}

.enbox {
    width: 100%;
    height: 100%;
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.enhead {
    height: 2.666667rem
        /* 100/37.5 */
    ;
    width: 100%;
    line-height: 1.066667rem
        /* 40/37.5 */
    ;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgb(0, 196, 48);
}

.enbtn {width: 16rem /* 600/37.5 */;
    height: 2.666667rem
        /* 100/37.5 */
    ;
    line-height: 1.6rem
        /* 60/37.5 */
    ;
    font-size: .8rem
        /* 30/37.5 */
    ;
    float:inline-end;
    overflow: hidden;
    margin-left: .266667rem /* 10/37.5 */;
}
.back {
    position: absolute;
    left: 0;
    margin-left: .266667rem /* 10/37.5 */;
}
.inputbox{
line-height: 2.666667rem /* 100/37.5 */;
}
.tittle {
    position: absolute;
    align-items: center;
}
.loginBtn{position: absolute;
    left: 50%;
    height: 1.6rem /* 60/37.5 */;
}